JP2005048977A - Refrigerator - Google Patents

Refrigerator Download PDF

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Publication number
JP2005048977A
JP2005048977A JP2003203298A JP2003203298A JP2005048977A JP 2005048977 A JP2005048977 A JP 2005048977A JP 2003203298 A JP2003203298 A JP 2003203298A JP 2003203298 A JP2003203298 A JP 2003203298A JP 2005048977 A JP2005048977 A JP 2005048977A
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Japan
Prior art keywords
storage container
oxygen
storage
container
oxygen concentration
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JP2003203298A
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Japanese (ja)
Inventor
Takao Hattori
隆雄 服部
Hironobu Okada
大信 岡田
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Toshiba Corp
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Toshiba Corp
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Priority to JP2003203298A priority Critical patent/JP2005048977A/en
Publication of JP2005048977A publication Critical patent/JP2005048977A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a user-friendly refrigerator controlling an air atmosphere in a storage container at a low oxygen state to maintain freshness of stored food, allowing removal of only the storage container from a body, and facilitating disposal of condensate produced by consumption of oxygen. <P>SOLUTION: The refrigerator is characterized in that the storage container 15 with an upper opening closed by a lid 21 is provided in a storage space 5, an oxygen concentration adjusting means using an electrolytic film element 25 is arranged in a body 1 side facing a permeation window 15a provided in a back face of the storage container, the storage container can be attached and detached with respect to the oxygen concentration adjusting means, a cooling body 31 with a lower temperature than a storage wall face is arranged in a neighborhood of the oxygen concentration adjusting means, oxygen in the storage container is removed via the permeation window, and condensate produced by consumption of oxygen is gathered at the cooling body. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、冷蔵庫に係り、特に食品を長期保存するための酸素濃度調整手段を備えた冷蔵庫に関する。
【0002】
【従来の技術】
近年、冷蔵庫は、冷却貯蔵温度の多様化のみならず、環境への配慮や経済性に対する関心の高まりを背景に、冷蔵庫本来の目的機能である食品の長期保存や省エネルギー化が重視される傾向にある。
【0003】
一般に食品は、冷蔵庫内で保存していても、保存期間の経過による劣化などで食されることなく廃棄されることが多く見受けられるものであり、食材の廃棄という無駄をなくすとともに常に新鮮な食材を得るため、食品を保存する際に素材の持ち味や栄養分、鮮度を長期間に亙って保つ機能が求められている。
【0004】
食品の劣化要因としては、乾燥、酸化等があげられる。乾燥に対しては、温度変動が少なく湿度が高い条件下での保存が有効であり、冷蔵庫における各室の温度帯専用に設けた冷却器の蒸発温度を上昇させて室内空気温度との差を少なくすることで、冷却器への霜の付着を極力少なくし、貯蔵室内を高湿に保って食品の乾燥を防ぐ方式が広く採用されている。
【0005】
さらに、野菜に関しては、乾燥防止とともに、青果物の熟成にともなって発生する老化ホルモンであるエチレンガスを除去することにより他の野菜の鮮度保持が可能であるが、空気中の酸素による呼吸・蒸散作用による鮮度の劣化は栄養分含有量の低下のみでなく変色など外観面での品質が低下する問題が発生するものであり、本発明では、冷蔵庫内部の酸素濃度を調整する方式に着目する。
【0006】
空気中には約20%の酸素が存在し、この酸素は魚や肉の油脂分の酸化をはじめ食品を劣化させる要因のひとつになっているが、酸化防止に関しては、空気雰囲気を制御するいわゆるCA(Controlled Atmosphere 大気雰囲気制御)によって食品と酸素とを遮断することによる保存が知られている。
【0007】
酸素濃度を調整するための手段としては、空気中の酸素と窒素を分離する方法がある。これには、ポリイミド系膜、ポリオレフィン系膜などの窒素が透過しにくい性質を利用した酸素透過膜を使用することで、酸素を選択的に透過させるものがあり、エアーポンプなどの加圧ポンプで中空糸状のモジュールとした膜に加圧空気を送り込み圧力調整によって酸素濃度を変化させることができる。
【0008】
また、ゼオライトや活性炭などを用い、酸素と窒素の吸着特性の差を利用して空気中の酸素と窒素を分離し酸素濃度を調整するPSA(Pressure Swing Absorption 圧力差吸着法)方式や、貯蔵空間内に窒素などの不活性ガスを充填したり、室内の酸素を窒素と置換して除去する方法、貯蔵室の密閉容器内を減圧することで酸素分圧を低下させる方法などがあり、これらの方法によって、野菜の呼吸作用の抑制、微生物、酵素の活性化抑制、油脂などの酸化抑制をおこない、食品の鮮度保存の向上をはかることができる。
【0009】
これらの方法の中では、本発明の出願人による出願である特願2002−177722に記載したように、貯蔵室内を減圧することによって減圧大気中の酸素濃度を低減させる方式が、比較的簡単な構成で冷蔵庫に収納保存している食品と酸素とを遮断し、収納貯蔵品の鮮度を長期に保持できる効果を有する。
【0010】
【発明が解決しようとする課題】
しかしながら、前記構成の場合、冷蔵庫内における酸素濃度調整手段である減圧機構は収納容器と実質的に一体に構成されていることから、収納容器は引き出した時点で低酸素状態を失い通常の大気雰囲気になってしまうため、鮮度保持ができなくなり、また、収納容器は比較的容量が小さいため鮮度保持を希望する食材の貯蔵量を増加することが困難であった。
【0011】
本発明は上記点を考慮してなされたものであり、食品収納容器内の空気雰囲気を低酸素状態に制御して収納食品の鮮度を長期に亙って保持するとともに、収納容器のみを本体から取り出すことができるようにし、また酸素の消費により生成される結露水の処理を容易にして、使い勝手を良好なものにした冷蔵庫を提供することを目的とする。
【0012】
【課題を解決するための手段】
上記課題を解決するために、本発明の冷蔵庫は、貯蔵空間に上部開口を蓋で閉塞した収納容器を設け、この収納容器の背面に設けた透過窓に対向する本体側に電解膜素子による酸素濃度調整手段を配置し、前記収納容器はこの酸素濃度調整手段に対して脱着可能とするとともに、酸素濃度調整手段の近傍に容器壁面より低温の冷却体を配置し、前記透過窓を介して収納容器内の酸素を除去するとともに、酸素の消費によって生成される結露を冷却体に集結させることを特徴とするものである。
【0013】
この構成により、収納容器内の酸素濃度を低下させ、収納品と酸素とを遮断して、野菜の呼吸作用の抑制、油脂などの酸化抑制、酵素活性の抑制、および好気性微生物の活動抑制ができ、貯蔵品の鮮度を保持して長期保存することができるとともに、収納容器は酸素濃度調整手段と脱着することができるため、低酸素状態を保持したまま単独で本体から取り外して持ち運んだり、冷蔵庫内の他の貯蔵空間に設置することができ、収納容器の数を増やして鮮度を保持した食材の量を増加することができる。また、電解膜素子反応によって収納容器に生じる水分を集結させることができ、容器壁面の結露を防止できるとともに結露水の排水処理を容易におこなうことができる。
【0014】
【発明の実施の形態】
以下、図面に基づき本発明の1実施形態について説明する。図1は本発明に係る冷蔵庫の縦断面図であり、断熱箱体からなる冷蔵庫本体(1)内部の貯蔵空間の最上部には冷蔵室(2)を配置し、その下方には冷蔵室よりやや高温で高湿度に保持された野菜室(3)を仕切り板を介して設けている。野菜室(3)の下方には断熱仕切壁(4)を介して、後に詳述する酸素濃度調整室にもなる温度切替室(5)と図示しない製氷貯氷室とを左右に区分して併置しており、最下部には上下2段に区分した冷凍室(6)を独立して配置している。
【0015】
各貯蔵室は、その前面開口部に各々専用の開閉扉を設けて閉塞するとともに、冷蔵空間および冷凍空間のそれぞれの背面に設置した冷蔵用冷却器(7)と冷凍用冷却器(8)および各冷却器の近傍に設けたファン(9)(10)とダクトによって冷気を循環させ、各貯蔵室毎に設定した温度に冷却制御され、冷蔵庫本体(1)の最下部に配置した冷凍空間の背面下部には、機械室(11)空間が形成されており、前記冷蔵用および冷凍用冷却器(7)(8)へ冷媒を供給する圧縮機(12)を設置している。
【0016】
上記構成において、前記冷蔵室(2)には食品を載置する棚(13)を設けるとともに、温度切替室(5)内には、食品を収納貯蔵する収納容器(15)を設けており、温度切替室(5)の閉扉状態での要部断面図である図2に示すように、切替室扉(16)の内側下部に取り付けた奥方向に延びる左右一対の支持枠(17)間に載置して保持することで切替室扉(16)とともに庫外へ引き出し自在としている。
【0017】
左右一対の支持枠(17)は、断面L字状部を成し、水平部を切替室(5)の底面に設けた滑車(18)で受けるとともに支持枠後端に滑車(19)を設ける構成とすることで切替室の底面レール(20)上を摺動自在としており、切替室扉(16)を閉じることにより、扉内面のガスケットが切替室(5)の前面開口周縁に吸着して室内を外気に対して密閉遮断するようにしている。
【0018】
前記収納容器(15)の上面開口には、開口を完全に覆う大きさに形成した蓋(21)を配置しており、この蓋(21)の下面にはシリコンゴムなどで形成した環状のシールパッキン(22)を固着し、蓋(21)が容器(15)の開口を覆って当接した際には、シールパッキン(22)によって隙間をなくし容器(15)内を密封するように形成する。
【0019】
しかして、(25)は酸素濃度調整手段としての電解膜素子であり、温度切替室(5)背面の冷凍用冷却器(8)を覆うエバカバー(23)にの前面に配置されており、概略拡大構成を図3に示すように、固体高分子電解質膜(26)をアノード電極(陽極)(27)とカソード電極(陰極)(28)で挟んで形成されたものを各電極面にスリット(29a)を設けたケース(29)内に収納してユニット化したものであり、カソード電極(28)面を温度切替室(5)の室内側に面して配置させている。
【0020】
アノード電極(27)は、外側から集電体、多孔質支持撥水膜、カーボン電極や白金触媒などから形成され、カソード電極(28)もアノードと同様に形成されている。
【0021】
そして、温度切替室(5)内の収納容器(15)の背面には透過窓(15a)が設けられており、前記カソード電極(28)側の面はこの透過窓(15a)を覆って対向し、周囲をシール材(30)でシールして設置されている。
【0022】
(31)はステンレス鋼などの金属で形成した冷却体であって、収納容器(15)の背面下部における電解膜素子(25)の近傍に設けられており、冷気循環による伝熱作用で合成樹脂製の収納容器(15)に比較して低温度に冷却されるものであり、冷却体(31)の表面には撥水処理を施すとともに、対応する容器底面には露ガイド透孔(15b)を穿設して、落下した結露水を収納容器(15)の下方に設置した露受け樋(32)で受け、室内後部に配置した冷却器(8)の下部に配した除霜水の排水口(33)に導くようにしている。
この構成により、閉扉によって収納容器(15)が温度切替室(5)内の所定位置に設置された場合は、図4に示すように、前記透過窓(15a)が電解膜素子(25)に覆われることになり、冷蔵室扉の表面に設けた図示しない操作パネルの押釦への押圧指示により、温度切替室(5)の閉扉の際に、リード線(34)により電極(27)(28)間に数ボルトの直流電圧をかけて高分子電解質膜(26)を動作させるものである。
【0023】
すなわち、直流電圧をかけることでアノード(27)側では、空気中の水分が消費され酸素を発生するよう反応し、同時に生成する電子は電線を通り、水素イオンは高分子電解質膜(26)を通ってカソード電極(28)に移動する。これに対するカソード(28)側は、収納容器(15)内部の空気中の酸素がアノード(27)側から移動してきた電子および水素イオンと結合して水に転化するものであり、結果的に、収納容器(15)内の酸素を消費して水を発生させることで、容器(15)内の酸素を除去し、温度切替室(5)の容器(15)内を通常大気状態の5%程度の低酸素濃度の雰囲気にすることができるため、食品の酸化進行や青果物の呼吸作用を効果的に抑制することができる。
【0024】
発生した水は、収納容器(15)の壁面よりも温度が低いことから冷却体(31)の表面に集中して結露することになり、容器(15)の壁面や温度切替室(5)の壁面への露付きを防ぐことができる。同時に、冷却体(31)の表面は撥水加工されているため、結露水ははじかれて冷却板面を流下し易くなり、ガイド透孔(15b)を通って下方に配置した露受け樋(32)上に落下し、さらに冷却器(8)の排水口(33)に導かれ、庫外に流出して蒸発処理されるものである。
【0025】
なお、冷却体(31)の表面を、前記とは逆に親水性の処理加工をすれば、電解膜素子(25)の動作で集積した露水や氷霜による水膜が冷却体(31)の表面を覆うことになり、ヒーター通電などで加熱蒸発させることが容易となり、露受け樋などの設置を不要にして構成を簡単にすることが可能となる。
【0026】
温度切替室(5)は、−20℃の冷凍温度からチルド、冷蔵、野菜保存温度、および+8℃程度のワイン保存温度まで多種の設定温度に任意に切替えができる20〜30Lの小容量の貯蔵室であり、冷蔵室扉の表面に設けた操作パネルの操作により冷凍用冷却器(8)からの冷気をダンパー制御によって導入し所定の設定温度に冷却するものである。
【0027】
したがって、温度切替室(5)を酸素濃度を調整しない通常の冷却温度切替室として使用する場合には、電解膜素子(25)を動作させないとともに、蓋(21)を常時開いた状態にして容器(15)内に冷気を導入して冷却してもよく、また蓋(21)で開口を閉塞し容器(15)の周囲からの間接的に冷却することにより高湿度を保つようにしてもよい。
【0028】
しかして、温度切替室(5)を酸素濃度が調整できる貯蔵室として仕様設定している場合は、室内における収納容器(15)の上面開口は蓋(21)で密閉されており、容器(15)内は、電解膜素子(25)の動作による低酸素濃度の雰囲気によって、例えば、容器内温度が−7℃でも、従来の−20℃での冷凍保存に相当する魚肉油脂分の酸化防止作用が得られるとともに、野菜用温度帯であれば青果物の呼吸作用の抑制などをおこなうことができ、各設定温度帯毎での食品の長期保存をはかることができる。
【0029】
この方式によれば、減圧方式に比べて真空ポンプなどの部材が不要であり、関連構成が簡単になってスペース効率が向上するとともに、音源がないので静音化をはかることができる。また収納容器(15)内を減圧することがないので密閉度をそれほどきびしく設ける必要がなく、取り扱いや構成が簡易になるとともに、耐圧構成も不要であることから収納容器の剛性を大きくする必要がなく、重量を軽く価格を低減できる。
【0030】
そして、温度切替室扉(16)を開扉して収納容器(15)を引き出した際には、図5に示すように、本体側に設置した電解膜素子(25)から透過窓(15a)が離間し収納容器(15)のみが蓋(21)とともに外部に引き出されるものである。
【0031】
このとき蓋(21)を、例えばヒンジ部(21a)に設けたバネ力を利用して、図のように引き出しと同時に開口させるようにしてもよいが、蓋(21)で密閉しておけば、容器内の低酸素濃度の保存状態を保持したまま本体側から取り外すことができるものであり、また、収納容器(15)を弁当箱程度の小形容器にすれば、取り出した容器は、冷蔵室(2)の載置棚(13)など他の貯蔵空間に収納して保管することができ、温度切替室(5)に別途新規な容器を設置すれば低酸素保持空間をさらに増加することができる。
【0032】
また、取り出した収納容器(15)を低酸素濃度状態を保持したまま遠隔地まで運送することも可能となり、帰省時や旅行の際の生鮮食品の移送に活用することができ、さらに、容器(15)は、扉(16)や支持枠(17)からも取り外し可能であるため、容器の清掃や洗浄も容易となる。
【0033】
以上により、収納容器(15)内の酸素が低濃度の状態にあると、保存食品と酸素とを遮断することになり、冷却作用による低温化とも相俟って、容器内は低酸素濃度で且つ低温の雰囲気状態となり、野菜の呼吸作用の抑制、油脂などの酸化抑制、酵素活性の抑制、好気性微生物の活動抑制といった効果があり、鮮度保存の向上をはかることができるとともに、収納容器(15)内の酸素を消費して生成された水分は冷却体(31)に集中的に付着させ、処理することができるため、容器壁面が濡れて食品に悪影響を及ぼすことなく酸素濃度を低下させることができる。
【0034】
なお、上記実施例においては、冷却体(31)を収納容器(15)の内部に設置したが、その設置位置は電解膜素子(25)の近傍であれば収納容器外でもよく、また同様に、収納容器および酸素濃度調整手段を温度切替室内に配置した構成で説明したが、これに限らず、冷蔵室や冷凍室、あるいは他の貯蔵空間に配置しても同様の効果を得られることは言うまでもなく、収納容器の大きさについても冷蔵室内の載置棚上に設置できるサイズを含め種々の形態を選択できるものである。
【0035】
【発明の効果】
以上説明したごとく、本発明の構成によれば、収納容器内の酸素濃度を低下させ、収納品と酸素とを遮断して、野菜の呼吸作用の抑制、油脂などの酸化抑制、酵素活性の抑制、および好気性微生物の活動抑制ができ、貯蔵品の鮮度を保持して長期保存することができるとともに、収納容器は酸素濃度調整手段と脱着することができるため、低酸素状態を保持したまま単独で本体から取り外して持ち運んだり、冷蔵庫内の他の貯蔵空間に設置することができ、収納容器の数を増やして鮮度を保持した食材の量を増加することができる。また、電解膜素子反応によって収納容器に生じる水分を集結させることができ、容器壁面の結露を防止できるとともに結露水の排水処理を容易におこなうことができる。
【図面の簡単な説明】
【図1】本発明の1実施形態を示す冷蔵庫の縦断面図である。
【図2】図1における低酸素雰囲気貯蔵室の構成を示す縦断面図である。
【図3】図4の電解膜素子の概略構成を示す断面図である。
【図4】図2の低酸素雰囲気貯蔵室の閉扉状態を示す拡大縦断面図である。
【図5】図4における収納容器を引き出した状態を示す縦断面図である。
【符号の説明】
1…冷蔵庫本体 2…冷蔵室 5…温度切替室
6…冷凍室 15…収納容器 15a…透過窓
15b…露ガイド透孔 16…切替室扉 17…支持枠
18、19…滑車 20…底面レール 21…蓋
21a…ヒンジ部 22…シールパッキン 23…エバカバー
25…電解膜素子 26…高分子電解質膜 27…アノード電極
28…カソード電極 29…ケース 30…シール材
31…冷却体 32…露受け樋 33…排水口
34…リード線
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a refrigerator, and more particularly to a refrigerator provided with oxygen concentration adjusting means for storing food for a long period of time.
[0002]
[Prior art]
In recent years, refrigerators have a tendency to place importance on long-term preservation of food and energy saving, which are the original objective functions of refrigerators, against the backdrop of not only diversification of cooling storage temperature but also environmental concerns and growing interest in economic efficiency. is there.
[0003]
In general, foods are often discarded without being eaten due to deterioration due to the passage of the storage period, even if they are stored in the refrigerator. Therefore, the function of keeping the taste, nutrients, and freshness of the ingredients over a long period of time when storing food is required.
[0004]
Food deterioration factors include drying and oxidation. For drying, storage under conditions of low temperature fluctuation and high humidity is effective, and the evaporating temperature of the cooler provided exclusively for the temperature zone of each room in the refrigerator is increased to reduce the difference from the room air temperature. By reducing the amount, frost adhesion to the cooler is reduced as much as possible, and a method of preventing the food from drying by keeping the storage chamber at a high humidity is widely adopted.
[0005]
Furthermore, with regard to vegetables, it is possible to maintain the freshness of other vegetables by removing ethylene gas, an aging hormone that occurs as fruits and vegetables ripen, as well as preventing drying, but breathing and transpiration due to oxygen in the air. Deterioration of freshness due to the occurrence of not only a decrease in nutrient content but also a problem of deterioration in quality in terms of appearance such as discoloration. In the present invention, attention is paid to a method of adjusting the oxygen concentration in the refrigerator.
[0006]
About 20% of oxygen is present in the air, and this oxygen is one of the factors that degrade foods, including the oxidation of fish and meat fats and oils. The preservation | save by interrupting | blocking a foodstuff and oxygen by (Controlled Atmosphere air atmosphere control) is known.
[0007]
As a means for adjusting the oxygen concentration, there is a method of separating oxygen and nitrogen in the air. This includes oxygen-permeable membranes such as polyimide membranes and polyolefin membranes that do not easily allow nitrogen to permeate, so that oxygen can be selectively permeated by pressure pumps such as air pumps. The oxygen concentration can be changed by adjusting the pressure by sending pressurized air into the membrane formed into a hollow fiber module.
[0008]
Also, PSA (Pressure Swing Absorption Pressure Difference Adsorption Method), which uses zeolite or activated carbon, etc., and adjusts the oxygen concentration by separating oxygen and nitrogen in the air using the difference in adsorption characteristics of oxygen and nitrogen, storage space There are methods such as filling the interior with an inert gas such as nitrogen, replacing oxygen in the room with nitrogen and removing it, or reducing the oxygen partial pressure by reducing the pressure inside the sealed container of the storage chamber. Depending on the method, it is possible to suppress the respiration of vegetables, suppress the activation of microorganisms and enzymes, suppress the oxidation of fats and oils, etc., and improve the preservation of food freshness.
[0009]
Among these methods, as described in Japanese Patent Application No. 2002-177722 filed by the applicant of the present invention, the method of reducing the oxygen concentration in the decompressed atmosphere by reducing the pressure in the storage chamber is relatively simple. With the configuration, the food stored and stored in the refrigerator and oxygen are blocked, and the stored freshness of the stored product can be maintained for a long time.
[0010]
[Problems to be solved by the invention]
However, in the case of the above configuration, since the decompression mechanism that is the oxygen concentration adjusting means in the refrigerator is substantially integrated with the storage container, the storage container loses the low oxygen state when it is pulled out, and is in a normal atmospheric atmosphere. Therefore, it is difficult to maintain the freshness, and the storage container has a relatively small capacity, so that it is difficult to increase the storage amount of the food that is desired to maintain the freshness.
[0011]
The present invention has been made in consideration of the above points, and controls the air atmosphere in the food storage container to a low oxygen state to maintain the freshness of the stored food for a long period of time. It is an object of the present invention to provide a refrigerator that can be taken out and facilitates the treatment of condensed water generated by consumption of oxygen, thereby improving usability.
[0012]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the refrigerator of the present invention is provided with a storage container having an upper opening closed with a lid in a storage space, and an oxygen generated by an electrolytic membrane element on the main body side facing a transmission window provided on the back surface of the storage container. Concentration adjusting means is disposed, and the storage container can be attached to and detached from the oxygen concentration adjusting means, and a cooling body having a temperature lower than the wall surface of the container is disposed in the vicinity of the oxygen concentration adjusting means and stored through the transmission window. While removing the oxygen in a container, the condensation produced | generated by consumption of oxygen is condensed on a cooling body, It is characterized by the above-mentioned.
[0013]
With this configuration, the oxygen concentration in the storage container is reduced, the stored product and oxygen are blocked, and the respiratory action of vegetables, the oxidation of fats and oils, the suppression of enzyme activity, and the activity of aerobic microorganisms are suppressed. It can be stored for a long time with its stored freshness, and since the storage container can be detached from the oxygen concentration adjusting means, it can be detached from the main body while being kept in a low oxygen state and carried around, It can be installed in another storage space inside, and the number of storage containers can be increased to increase the amount of food that maintains freshness. Moreover, the water | moisture content produced in a storage container by electrolytic membrane element reaction can be collected, the dew condensation of a container wall surface can be prevented, and the drainage process of condensed water can be performed easily.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a refrigerator according to the present invention, in which a refrigerator compartment (2) is arranged at the top of a storage space inside a refrigerator main body (1) comprising a heat insulating box, and below the refrigerator compartment. A vegetable room (3) maintained at high temperature and high humidity is provided via a partition plate. Below the vegetable compartment (3), a temperature switching chamber (5), which will also be an oxygen concentration adjustment chamber, which will be described in detail later, and an ice making ice storage chamber (not shown) are placed side by side through a heat insulating partition wall (4). In the lowermost part, a freezer compartment (6) divided into two upper and lower stages is arranged independently.
[0015]
Each storage chamber is closed by providing a dedicated opening / closing door at the front opening thereof, and a refrigeration cooler (7), a refrigeration cooler (8), Cooling air is circulated by fans (9) and (10) and ducts provided in the vicinity of each cooler, cooling control is performed at a temperature set for each storage room, and the freezing space disposed at the bottom of the refrigerator body (1) A machine room (11) space is formed in the lower part of the back surface, and a compressor (12) for supplying refrigerant to the refrigeration and freezing coolers (7) and (8) is installed.
[0016]
In the above configuration, the refrigerator compartment (2) is provided with a shelf (13) for placing food, and the temperature switching chamber (5) is provided with a storage container (15) for storing and storing food, As shown in FIG. 2, which is a cross-sectional view of the main part of the temperature switching chamber (5) in the closed state, between the pair of left and right support frames (17) extending in the back direction attached to the inner lower portion of the switching chamber door (16). By being placed and held, it can be pulled out of the cabinet together with the switching chamber door (16).
[0017]
The pair of left and right support frames (17) have an L-shaped section, receive a horizontal portion by a pulley (18) provided on the bottom surface of the switching chamber (5), and provide a pulley (19) at the rear end of the support frame. By being configured, it is slidable on the bottom rail (20) of the switching chamber, and by closing the switching chamber door (16), the gasket on the inner surface of the door is adsorbed to the front opening periphery of the switching chamber (5). The room is hermetically sealed against the outside air.
[0018]
A lid (21) formed in a size that completely covers the opening is disposed in the upper surface opening of the storage container (15), and an annular seal formed of silicon rubber or the like is disposed on the lower surface of the lid (21). When the packing (22) is fixed and the lid (21) contacts and covers the opening of the container (15), the seal (22) eliminates the gap and seals the inside of the container (15). .
[0019]
Thus, (25) is an electrolytic membrane element as an oxygen concentration adjusting means, which is arranged on the front surface of the temperature cover (5) on the rear cover (23) that covers the refrigeration cooler (8) on the back surface. As shown in FIG. 3, an enlarged structure is formed by sandwiching a solid polymer electrolyte membrane (26) between an anode electrode (anode) (27) and a cathode electrode (cathode) (28). 29a) is housed in a case (29) provided with a unit, and the surface of the cathode electrode (28) faces the room side of the temperature switching chamber (5).
[0020]
The anode electrode (27) is formed from the outside from a current collector, a porous support water repellent film, a carbon electrode, a platinum catalyst, and the like, and the cathode electrode (28) is formed in the same manner as the anode.
[0021]
A transmission window (15a) is provided on the back surface of the storage container (15) in the temperature switching chamber (5), and the surface on the cathode electrode (28) side covers and opposes the transmission window (15a). The periphery is sealed with a sealing material (30).
[0022]
(31) is a cooling body formed of a metal such as stainless steel, and is provided in the vicinity of the electrolytic membrane element (25) at the lower back of the storage container (15). Compared with the storage container (15) made of water, it is cooled to a lower temperature. The surface of the cooling body (31) is subjected to water repellent treatment, and the corresponding container bottom surface has a dew guide through hole (15b). The dew condensation water that has fallen is received by a dew receiving bowl (32) installed below the storage container (15), and the defrost water is disposed at the lower part of the cooler (8) disposed at the rear of the room. It leads to the mouth (33).
With this configuration, when the storage container (15) is installed at a predetermined position in the temperature switching chamber (5) by the closed door, the transmission window (15a) is connected to the electrolytic membrane element (25) as shown in FIG. When the temperature switching chamber (5) is closed by a pressing instruction to a push button of an operation panel (not shown) provided on the surface of the refrigerator compartment door, the lead wire (34) causes the electrodes (27) and (28) to close. The polymer electrolyte membrane (26) is operated by applying a DC voltage of several volts in between.
[0023]
That is, on the anode (27) side by applying a DC voltage, it reacts so that moisture in the air is consumed and oxygen is generated, and simultaneously generated electrons pass through the electric wire, and hydrogen ions pass through the polymer electrolyte membrane (26). And move to the cathode electrode (28). On the other hand, on the cathode (28) side, oxygen in the air inside the storage container (15) is combined with electrons and hydrogen ions that have moved from the anode (27) side and converted into water, and as a result, The oxygen in the container (15) is removed by consuming oxygen in the storage container (15) to generate water, and the inside of the container (15) in the temperature switching chamber (5) is about 5% of the normal atmospheric condition. Therefore, the progress of oxidation of food and the respiration of fruits and vegetables can be effectively suppressed.
[0024]
Since the generated water has a temperature lower than that of the wall surface of the storage container (15), it will be condensed on the surface of the cooling body (31), so that the water on the wall surface of the container (15) and the temperature switching chamber (5) It is possible to prevent dew on the wall surface. At the same time, since the surface of the cooling body (31) is water-repellent, the dew condensation water is repelled and it is easy to flow down the cooling plate surface, and the dew receiving bowl (15b) disposed below through the guide through hole (15b) 32) It falls on the top, is further led to the drainage port (33) of the cooler (8), flows out of the cabinet, and is evaporated.
[0025]
If the surface of the cooling body (31) is subjected to hydrophilic processing, contrary to the above, the water film formed by dew water or ice frost accumulated by the operation of the electrolytic membrane element (25) becomes the cooling body (31). Since the surface is covered, it is easy to heat and evaporate by energizing the heater, etc., and it becomes possible to simplify the configuration without requiring installation of a dew receiving bowl or the like.
[0026]
The temperature switching chamber (5) has a small storage capacity of 20-30L, which can be arbitrarily switched from -20 ° C freezing temperature to chilled, refrigerated, vegetable storage temperature, and wine storage temperature of about + 8 ° C. It is a room, and cool air from the refrigeration cooler (8) is introduced by damper control by operation of an operation panel provided on the surface of the refrigerator compartment door, and is cooled to a predetermined set temperature.
[0027]
Therefore, when the temperature switching chamber (5) is used as a normal cooling temperature switching chamber in which the oxygen concentration is not adjusted, the electrolytic membrane element (25) is not operated, and the lid (21) is always opened and the container is opened. (15) Cool air may be introduced into the interior to cool, or the opening may be closed with a lid (21), and the high humidity may be maintained by indirect cooling from around the container (15). .
[0028]
If the temperature switching chamber (5) is set as a storage chamber capable of adjusting the oxygen concentration, the top opening of the storage container (15) in the room is sealed with a lid (21), and the container (15 ) Shows an antioxidant effect of fish fat and oil corresponding to conventional frozen storage at −20 ° C., even if the temperature in the container is −7 ° C., depending on the atmosphere of low oxygen concentration due to the operation of the electrolytic membrane element (25). In the vegetable temperature range, it is possible to suppress the respiratory action of fruits and vegetables, and food can be stored for a long time in each set temperature range.
[0029]
According to this method, a member such as a vacuum pump is not required as compared with the decompression method, the related configuration is simplified and the space efficiency is improved, and since there is no sound source, noise reduction can be achieved. Further, since the inside of the storage container (15) is not depressurized, it is not necessary to provide a tight seal, the handling and configuration are simplified, and the pressure-resistant configuration is not required, so the rigidity of the storage container needs to be increased. The weight is light and the price can be reduced.
[0030]
When the temperature switching chamber door (16) is opened and the storage container (15) is pulled out, as shown in FIG. 5, the transmission window (15a) is opened from the electrolytic membrane element (25) installed on the main body side. Are separated and only the storage container (15) is pulled out together with the lid (21).
[0031]
At this time, the lid (21) may be opened simultaneously with the drawer as shown in the drawing using, for example, a spring force provided on the hinge portion (21a). The container can be removed from the main body while maintaining a low oxygen concentration storage state, and if the storage container (15) is made into a small container of a lunch box size, the removed container is stored in the refrigerator compartment. It can be stored and stored in another storage space such as the mounting shelf (13) in (2), and if a new container is installed in the temperature switching chamber (5), the low oxygen holding space can be further increased. it can.
[0032]
In addition, the storage container (15) that has been taken out can be transported to a remote location while maintaining a low oxygen concentration state, and can be used for transporting fresh food when returning home or traveling. 15) can be removed from the door (16) and the support frame (17), so that the container can be easily cleaned and washed.
[0033]
As described above, when the oxygen in the storage container (15) is in a low concentration state, the stored food and oxygen are cut off, and in combination with the low temperature due to the cooling action, the container has a low oxygen concentration. In addition, it has a low-temperature atmosphere state and has effects such as suppression of vegetable respiration, oxidation of fats and oils, suppression of enzyme activity, and suppression of aerobic microorganism activity. 15) Since the moisture generated by consuming oxygen in the container can be concentrated and attached to the cooling body (31), the container wall gets wet and the oxygen concentration is lowered without adversely affecting the food. be able to.
[0034]
In the above embodiment, the cooling body (31) is installed inside the storage container (15). However, as long as the installation position is in the vicinity of the electrolytic membrane element (25), it may be outside the storage container. In the above description, the storage container and the oxygen concentration adjusting means are described as being arranged in the temperature switching chamber. Needless to say, various sizes can be selected for the size of the storage container including the size that can be set on the mounting shelf in the refrigerator compartment.
[0035]
【The invention's effect】
As described above, according to the configuration of the present invention, the oxygen concentration in the storage container is reduced, the stored product and oxygen are blocked, the respiration of vegetables is suppressed, the oxidation of fats and oils is suppressed, and the enzyme activity is suppressed. In addition, the activity of aerobic microorganisms can be suppressed, the freshness of stored products can be preserved for a long period of time, and the storage container can be detached from the oxygen concentration adjusting means, so that it remains alone while maintaining a low oxygen state. It can be removed from the main body and carried, or can be installed in another storage space in the refrigerator, and the number of storage containers can be increased to increase the amount of food that maintains freshness. Moreover, the water | moisture content produced in a storage container by electrolytic membrane element reaction can be collected, the dew condensation of a container wall surface can be prevented, and the drainage process of condensed water can be performed easily.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view of a refrigerator showing an embodiment of the present invention.
2 is a longitudinal sectional view showing a configuration of a low oxygen atmosphere storage chamber in FIG. 1. FIG.
3 is a cross-sectional view showing a schematic configuration of the electrolytic membrane element of FIG. 4;
4 is an enlarged longitudinal sectional view showing a closed state of the low oxygen atmosphere storage chamber of FIG. 2. FIG.
5 is a longitudinal sectional view showing a state in which the storage container in FIG. 4 is pulled out.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Refrigerator main body 2 ... Refrigeration room 5 ... Temperature switching room 6 ... Freezing room 15 ... Storage container 15a ... Transmission window 15b ... Dew guide through-hole 16 ... Switching room door 17 ... Support frame 18, 19 ... Pulley 20 ... Bottom rail 21 ... Lid 21a ... Hinge part 22 ... Seal packing 23 ... Eva cover 25 ... Electrolytic membrane element 26 ... Polymer electrolyte membrane 27 ... Anode electrode 28 ... Cathode electrode 29 ... Case 30 ... Sealing material 31 ... Cooling body 32 ... Dew receptacle 33 ... Drain port 34 ... Lead wire

Claims (3)

貯蔵空間に上部開口を蓋で閉塞した収納容器を設け、この収納容器の背面に設けた透過窓に対向する本体側に電解膜素子による酸素濃度調整手段を配置し、前記収納容器はこの酸素濃度調整手段に対して脱着可能とするとともに、酸素濃度調整手段の近傍に容器壁面より低温の冷却体を配置し、前記透過窓を介して収納容器内の酸素を除去するとともに、酸素の消費によって生成される結露を冷却体に集結させることを特徴とする冷蔵庫。The storage space is provided with a storage container whose upper opening is closed with a lid, and an oxygen concentration adjusting means by an electrolytic membrane element is disposed on the main body side facing the transmission window provided on the back surface of the storage container. It is possible to detach from the adjusting means, and a cooling body at a temperature lower than the wall surface of the container is arranged in the vicinity of the oxygen concentration adjusting means to remove oxygen in the storage container through the permeation window and to generate by consumption of oxygen A refrigerator characterized in that condensed condensation is collected on a cooling body. 冷却体の表面に撥水処理を施したことを特徴とする請求項1記載の冷蔵庫。The refrigerator according to claim 1, wherein the surface of the cooling body is subjected to a water repellent treatment. 冷却体の表面に親水性処理を施したことを特徴とする請求項1記載の冷蔵庫。The refrigerator according to claim 1, wherein the surface of the cooling body is subjected to a hydrophilic treatment.
JP2003203298A 2003-07-29 2003-07-29 Refrigerator Pending JP2005048977A (en)

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006266539A (en) * 2005-03-22 2006-10-05 Mitsubishi Electric Corp Refrigerator
JP2011202898A (en) * 2010-03-26 2011-10-13 Toshiba Corp Refrigerator
WO2012091374A2 (en) * 2010-12-29 2012-07-05 Jang Se Gi Refrigerator using nitrogen
CN102679660A (en) * 2011-03-17 2012-09-19 株式会社东芝 Refrigerator
WO2012124948A2 (en) * 2011-03-15 2012-09-20 Jang Se Gi Food storage container used in nitrogen refrigerator
CN103014747A (en) * 2011-09-26 2013-04-03 株式会社东芝 Disoxidation device and refrigerator
JP2013160486A (en) * 2012-02-08 2013-08-19 Toshiba Corp Refrigerator
JP2014052140A (en) * 2012-09-07 2014-03-20 Toshiba Corp Refrigerator
JP2015094026A (en) * 2013-11-14 2015-05-18 株式会社東芝 Oxygen reducing apparatus and refrigerator
JP2015094553A (en) * 2013-11-13 2015-05-18 株式会社東芝 Oxygen reducing device and refrigerator
CN105526761A (en) * 2014-10-15 2016-04-27 株式会社东芝 Oxygen reducing device and storage box
WO2023098386A1 (en) * 2021-12-03 2023-06-08 青岛海尔电冰箱有限公司 Refrigerator and electrolytic oxygen removal device thereof

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006266539A (en) * 2005-03-22 2006-10-05 Mitsubishi Electric Corp Refrigerator
JP2011202898A (en) * 2010-03-26 2011-10-13 Toshiba Corp Refrigerator
WO2012091374A3 (en) * 2010-12-29 2012-10-18 Jang Se Gi Refrigerator using nitrogen
WO2012091374A2 (en) * 2010-12-29 2012-07-05 Jang Se Gi Refrigerator using nitrogen
WO2012124948A2 (en) * 2011-03-15 2012-09-20 Jang Se Gi Food storage container used in nitrogen refrigerator
WO2012124948A3 (en) * 2011-03-15 2012-12-20 Jang Se Gi Food storage container used in nitrogen refrigerator
CN102679660A (en) * 2011-03-17 2012-09-19 株式会社东芝 Refrigerator
JP2012193921A (en) * 2011-03-17 2012-10-11 Toshiba Corp Refrigerator
CN103014747A (en) * 2011-09-26 2013-04-03 株式会社东芝 Disoxidation device and refrigerator
JP2013160486A (en) * 2012-02-08 2013-08-19 Toshiba Corp Refrigerator
JP2014052140A (en) * 2012-09-07 2014-03-20 Toshiba Corp Refrigerator
JP2015094553A (en) * 2013-11-13 2015-05-18 株式会社東芝 Oxygen reducing device and refrigerator
JP2015094026A (en) * 2013-11-14 2015-05-18 株式会社東芝 Oxygen reducing apparatus and refrigerator
CN105526761A (en) * 2014-10-15 2016-04-27 株式会社东芝 Oxygen reducing device and storage box
WO2023098386A1 (en) * 2021-12-03 2023-06-08 青岛海尔电冰箱有限公司 Refrigerator and electrolytic oxygen removal device thereof

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